Urban Land-Cover Change Detection through Sub-Pixel Imperviousness Mapping Using Remotely Sensed Data

Accurate and updated information on the status and trends of urban ecosystems is needed to develop strategies for sustainable development and to improve the livelihood of cities. This article describes the development of a Sub-pixel Imperviousness Change Detection (SICD) approach to detect urban land-cover changes using Landsat and high-resolution imagery. The authors note that most mapping techniques that use images to the pixel level do not capture the sub-pixel mixtures of land-cover and land-use types. The sub-pixel percent imperviousness was mapped for two dates (09 March 1993 and 11 March 2001) over western Georgia using a regression tree algorithm. The authors contend that the accuracy of the predicted imperviousness was reasonable based on a comparison using independent reference data. Areas with a significant increase (greater than 20 percent) in impervious surface from 1993 to 2001 were mostly related to known land-cover/land-use changes that occurred in this area, suggesting that the spatial change of an impervious surface is a useful indicator for identifying spatial extent, intensity, and, potentially, type of urban land-cover/land-use changes. In addition, the procedure for mapping imperviousness is objective and repeatable, hence, can be used for monitoring urban land-cover/land-use change over a large geographic area. The authors conclude with a discussion of the potential applications and limitations of the products developed through this study to urban environmental studies.

  • Availability:
  • Authors:
    • Yang, Limin
    • Xian, George
    • Klaver, Jacqueline M
    • Deal, Brian
  • Publication Date: 2003-9


  • English

Media Info

  • Media Type: Print
  • Features: Figures; Illustrations; References; Tables;
  • Pagination: pp 1003-1010
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01001874
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 12 2005 2:52PM